3DP-Workshop
Here’s a list of websites that I’ve found to be very useful in learning and teaching 3D Printing:

3D Model repositories & curriculum

3D Printed Prosthetics

3D Printing Services

  • Shapeways – Service bureau that can 3D print in many different materials including metals using industrial grade 3D printers
  • Hubs – (formally 3D Hubs) service bureau for printing and CNC among other methods

3D Design Tools

Minecraft Tools for 3D printingSee my post for more details